package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.google.gson.JsonObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@SuppressWarnings("all")
/**
 *@ClassName UserServiceImpl
 *@Description TODO
 *@Author @O_o  GW__
 *@Date 2025/5/28 17:01
 *@Version 1.0
 */
@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private WeChatProperties WeChatProperties;
    @Autowired
    private UserMapper userMapper;
//    微信服务接口地址
    private static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
//        调用微信接口，获取当前用户的openid
        String openid = getOpenid(userLoginDTO.getCode());
//        Map<String,String> map = new HashMap<>();
//        map.put("appid",WeChatProperties.getAppid());
//        map.put("secret",WeChatProperties.getSecret());
//        map.put("js_code",userLoginDTO.getCode());
//        map.put("grant_type","authorization_code");
//        String json = HttpClientUtil.doGet(WX_LOGIN, map);
////        返回的数据是Json格式的字符串,  需要将其转换成JSON对象,获取openid
//        JSONObject jsonObject = JSON.parseObject(json);
//        String openid = jsonObject.getString("openid");

//        判断openid是否为空，如果为空则登录失败，抛出业务异常
        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
//        判断当前用户是否为新用户
        User user = userMapper.getByOpenid(openid);
//        如果是新用户则自动完成注册
        if (user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
//        返回这个用户对象
        return user;
    }

    /**
     * 获取微信用户的openid
     * @param code
     * @return
     */
    private String getOpenid(String code) {
        Map<String,String> map = new HashMap<>();
        map.put("appid",WeChatProperties.getAppid());
        map.put("secret",WeChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        return jsonObject.getString("openid");
    }
}
